In [18]:
import random 

# Generate random numbers
number1 = random.randint(0, 9)
number2 = random.randint(0, 9)

# Prompt the user to enter an answer
answer = eval(input("What is " + str(number1) + " + " 
    + str(number2) + "? "))
    
# Display result    
print(number1, "+", number2, "=", answer, 
    "is", number1 + number2 == answer)

What is 3 + 8? 10
3 + 8 = 10 is False
In [19]:
int("3232")
Out[19]:
3232
In [20]:
eval("555")
Out[20]:
555
In [23]:
eval("45.55")
Out[23]:
45.55
In [22]:
int("4+7")

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Input In [22], in <cell line: 1>()
----> 1 int("4+7")

ValueError: invalid literal for int() with base 10: '4+7'
In [28]:
import random
In [36]:
a = random.randint(0,255)
chr(a)
Out[36]:
'Î'
In [38]:
number = eval(input("Enter an integer: "))

if number % 5 == 0 :
   print("HiFive");

if number % 2 == 0 :
   print("HiEven");

Enter an integer: 10
HiFive
HiEven
In [39]:
day = 0 # birth day to be determined
  
# Prompt the user to answer the first question
question1 = "Is your birthday in Set1?\n" + \
    " 1  3  5  7\n" + \
    " 9 11 13 15\n" + \
    "17 19 21 23\n" + \
    "25 27 29 31" + \
    "\nEnter 0 for No and 1 for Yes: " 
answer = eval(input(question1))
  
if answer == 1:
   day += 1
 
# Prompt the user to answer the second question
question2 = "Is your birthday in Set2?\n" + \
    " 2  3  6  7\n" + \
    "10 11 14 15\n" + \
    "18 19 22 23\n" + \
    "26 27 30 31" + \
    "\nEnter 0 for No and 1 for Yes: " 
answer = eval(input(question2))
  
if answer == 1:
   day += 2
 
# Prompt the user to answer the third question
question3 = "Is your birthday in Set3?\n" + \
    " 4  5  6  7\n" + \
    "12 13 14 15\n" + \
    "20 21 22 23\n" + \
    "28 29 30 31" + \
    "\nEnter 0 for No and 1 for Yes: " 
answer = eval(input(question3))
  
if answer == 1:
   day += 4
  
# Prompt the user to answer the fourth question
question4 = "Is your birthday in Set4?\n" + \
    " 8  9 10 11\n" + \
    "12 13 14 15\n" + \
    "24 25 26 27\n" + \
    "28 29 30 31" + \
    "\nEnter 0 for No and 1 for Yes: " 
answer = eval(input(question4))
  
if answer == 1:
    day += 8
  
# Prompt the user to answer the fifth question
question5 = "Is your birthday in Set5?\n" + \
    "16 17 18 19\n" + \
    "20 21 22 23\n" + \
    "24 25 26 27\n" + \
    "28 29 30 31" + \
    "\nEnter 0 for No and 1 for Yes: " 
answer = eval(input(question5))
  
if answer == 1:
    day += 16

print("\nYour birthday is" + str(day) + "!")

Is your birthday in Set1?
 1  3  5  7
 9 11 13 15
17 19 21 23
25 27 29 31
Enter 0 for No and 1 for Yes: 1
Is your birthday in Set2?
 2  3  6  7
10 11 14 15
18 19 22 23
26 27 30 31
Enter 0 for No and 1 for Yes: 0
Is your birthday in Set3?
 4  5  6  7
12 13 14 15
20 21 22 23
28 29 30 31
Enter 0 for No and 1 for Yes: 1
Is your birthday in Set4?
 8  9 10 11
12 13 14 15
24 25 26 27
28 29 30 31
Enter 0 for No and 1 for Yes: 1
Is your birthday in Set5?
16 17 18 19
20 21 22 23
24 25 26 27
28 29 30 31
Enter 0 for No and 1 for Yes: 1

Your birthday is29!
In [41]:
import random

# 1. Generate two random single-digit integers
number1 = random.randint(0, 9)
number2 = random.randint(0, 9)

# 2. If number1 < number2, swap number1 with number2
if number1 < number2:
    number1, number2 = number2, number1 # Simultaneous assignment

# 4. Prompt the student to answer "what is number1 - number2?"
answer = eval(input("What is " + str(number1) + " - " + 
    str(number2) + "? "))

# 4. Grade the answer and display the result
if number1 - number2 == answer:
    print("You are correct!")
else:
    print("Your answer is wrong.\n", number1, "-",
        number2, "is", number1 - number2)

What is 7 - 1? 4
Your answer is wrong.
 7 - 1 is 6
In [42]:
a = 7
b = 9
a, b = b, a
In [43]:
print(a,b)

9 7
In [44]:
year = eval(input("Enter a year: "))
zodiacYear = year % 12 
if zodiacYear == 0:
    print("monkey")
elif zodiacYear == 1:
    print("rooster")
elif zodiacYear == 2:
    print("dog")
elif zodiacYear == 3:
    print("pig")
elif zodiacYear == 4: 
    print("rat")
elif zodiacYear == 5: 
    print("ox")
elif zodiacYear == 6:
    print("tiger")
elif zodiacYear == 7:
    print("rabbit")
elif zodiacYear == 8:
    print("dragon")
elif zodiacYear == 9:
    print("snake")
elif zodiacYear == 10:
    print("horse")
else: 
    print("sheep")

Enter a year: 2022
tiger
In [54]:
r1 = -20
if r1 >= 0:
    area1 = r1 * r1 * 3.14
print(area1)

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Input In [54], in <cell line: 4>()
      2 if r1 >= 0:
      3     area1 = r1 * r1 * 3.14
----> 4 print(area1)

NameError: name 'area1' is not defined
In [55]:
# Prompt the user to enter weight in pounds
weight = eval(input("Enter weight in pounds: "))
    
# Prompt the user to enter height in inches
height = eval(input("Enter height in inches: "))
    
KILOGRAMS_PER_POUND = 0.45359237 # Constant
METERS_PER_INCH = 0.0254 # Constant 
    
# Compute BMI
weightInKilograms = weight * KILOGRAMS_PER_POUND 
heightInMeters = height * METERS_PER_INCH
bmi = weightInKilograms / (heightInMeters * heightInMeters)

# Display result
print("BMI is", format(bmi, ".2f"))
if bmi < 18.5:
    print("Underweight")
elif bmi < 25:
    print("Normal")
elif bmi < 30:
    print("Overweight")
else:
    print("Obese")
    

Enter weight in pounds: 22
Enter height in inches: 22
BMI is 31.96
Obese
In [56]:
import sys

# Prompt the user to enter filing status
status = eval(input(
    "(0-single filer, 1-married jointly,\n" +
    "2-married separately, 3-head of household)\n" +
    "Enter the filing status: "))

# Prompt the user to enter taxable income
income = eval(input("Enter the taxable income: "))

# Compute tax
tax = 0

if status == 0:  # Compute tax for single filers
    if income <= 8350:
        tax = income * 0.10
    elif income <= 33950:
        tax = 8350 * 0.10 + (income - 8350) * 0.15
    elif income <= 82250:
        tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + \
            (income - 33950) * 0.25
    elif income <= 171550:
        tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + \
            (82250 - 33950) * 0.25 + (income - 82250) * 0.28
    elif income <= 372950:
        tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + \
            (82250 - 33950) * 0.25 + (171550 - 82250) * 0.28 + \
            (income - 171550) * 0.33
    else:
        tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + \
              (82250 - 33950) * 0.25 + (171550 - 82250) * 0.28 + \
              (372950 - 171550) * 0.33 + (income - 372950) * 0.35;
elif status == 1: # Compute tax for married file jointly
    print("Left as exercise")
elif status == 2: # Compute tax for married separately
    print("Left as exercise")
elif status == 3: # Compute tax for head of household
    print("Left as exercise")
else:
    print("Error: invalid status")
    sys.exit()

# Display the result
print("Tax is", format(tax, ".2f"))

(0-single filer, 1-married jointly,
2-married separately, 3-head of household)
Enter the filing status: 0
Enter the taxable income: 666666
Tax is 211016.60
In [57]:
age = 18
In [58]:
age > 15
Out[58]:
True
In [59]:
not (age > 15)
Out[59]:
False
In [63]:
# Receive an input
number = eval(input("Enter an integer: "))

if number % 2 == 0 and number % 3 == 0:
    print(number, "is divisible by 2 and 3")

if number % 2 == 0 or number % 3 == 0:
    print(number, "is divisible by 2 or 3")

if (number % 2 == 0 or number % 3 == 0) and \
       not (number % 2 == 0 and number % 3 == 0):
    print(number, "divisible by 2 or 3, but not both")

Enter an integer: 8
8 is divisible by 2 or 3
8 divisible by 2 or 3, but not both
In [65]:
year = eval(input("Enter a year: "))

# Check if the year is a leap year 
isLeapYear = (year % 4 == 0 and year % 100 != 0) or \
   (year % 400 == 0)

# Display the result 
print(year, "is a leap year?", isLeapYear)

Enter a year: 2024
2024 is a leap year? True
In [70]:
import random

# Generate a lottery
lottery = random.randint(0, 99)

# Prompt the user to enter a guess
guess = eval(input("Enter your lottery pick (two digits): "))

# Get digits from lottery
lotteryDigit1 = lottery // 10
lotteryDigit2 = lottery % 10

# Get digits from guess
guessDigit1 = guess // 10
guessDigit2 = guess % 10

print("The lottery number is", lottery)

# Check the guess
if guess == lottery:
    print("Exact match: you win $10,000")
elif (guessDigit2 == lotteryDigit1 and \
  guessDigit1 == lotteryDigit2):
    print("Match all digits: you win $3,000")
elif (guessDigit1 == lotteryDigit1 
        or guessDigit1 == lotteryDigit2 
        or guessDigit2 == lotteryDigit1 
        or guessDigit2 == lotteryDigit2):
    print("Match one digit: you win $1,000")
else:
    print("Sorry, no match")

Enter your lottery pick (two digits): 67
The lottery number is 57
Match one digit: you win $1,000
In [67]:
25 // 10
Out[67]:
2
In [68]:
25 % 10
Out[68]:
5
In [74]:
a = 4
d = 88 if a > 4 else 9 
d
Out[74]:
9
In [75]:
c = a + -d
c
Out[75]:
-5
In [76]:
1 - 2 - 3
Out[76]:
-4
In [77]:
(1 - 2) - 3
Out[77]:
-4
In [78]:
1 - (2 - 3)
Out[78]:
2
In [79]:
2 ** 3 ** 4
Out[79]:
2417851639229258349412352
In [80]:
2 ** (3 ** 4)
Out[80]:
2417851639229258349412352
In [81]:
(2 ** 3) ** 4
Out[81]:
4096
In [ ]:
import turtle

x1, y1 = eval(input("Enter the center of a circle x, y: "))
radius = eval(input("Enter the radius of the circle: "))
x2, y2 = eval(input("Enter a point x, y: "))

# Draw the circle
turtle.penup() # Pull the pen up
turtle.goto(x1, y1 - radius)
turtle.pendown() # Pull the pen down
turtle.circle(radius)

# Draw the point
turtle.penup() # Pull the pen up
turtle.goto(x2, y2)
turtle.pendown() # Pull the pen down
turtle.begin_fill() # Begin to fill color in a shape
turtle.color("red")
turtle.circle(3) 
turtle.end_fill() # Fill the shape

# Display the status
turtle.penup() # Pull the pen up
turtle.goto(x1 - 70, y1 - radius - 20)
turtle.pendown() 

d = ((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1)) ** 0.5
if d <= radius:
    turtle.write("The point is inside the circle") 
else:
    turtle.write("The point is outside the circle") 

turtle.hideturtle()

turtle.done() 

Enter the center of a circle x, y: 60,60
Enter the radius of the circle: 30
Enter a point x, y: 120,120
In [1]:
## CHAPTER 5
In [4]:
count = 0
while count < 5:
    print("Programming is fun!", "count =", count)
    count = count + 1

Programming is fun! count = 0
Programming is fun! count = 1
Programming is fun! count = 2
Programming is fun! count = 3
Programming is fun! count = 4
In [9]:
# 1+2+3 + ...... + 100000
count = 0
sum = 0
while count < 1_000_000_000:
    count = count + 1
    sum = sum + count
print(sum)

500000000500000000
In [13]:
import random
import time

correctCount = 0 # Count the number of correct answers
count = 0 # Count the number of questions
NUMBER_OF_QUESTIONS = 3 # Constant

startTime = time.time() # Get start time

while count < NUMBER_OF_QUESTIONS:
    # 1. Generate two random single-digit integers
    number1 = random.randint(0, 9)
    number2 = random.randint(0, 9)

    # 2. If number1 < number2, swap number1 with number2
    if number1 < number2:
        number1, number2 = number2, number1

    # 3. Prompt the student to answer "what is number1 - number2?" 
    answer = eval(input("What is " + str(number1) + " - " + 
        str(number2) + "? "))

    # 5. Grade the answer and display the result
    if number1 - number2 == answer:
        print("You are correct!")
        correctCount += 1
    else:
        print("Your answer is wrong.\n", number1, "-",
            number2, "should be", (number1 - number2))

    # Increase the count
    count += 1

endTime = time.time() # Get end time
testTime = int(endTime - startTime) # Get test time
print("Correct count is", correctCount, "out of", 
    NUMBER_OF_QUESTIONS, "\nTest time is", testTime, "seconds")

What is 5 - 3? 2
You are correct!
What is 8 - 6? 2
You are correct!
What is 9 - 0? 2
Your answer is wrong.
 9 - 0 should be 9
Correct count is 2 out of 3 
Test time is 8 seconds
In [14]:
import random

# Generate a random number to be guessed
number = random.randint(1, 100)

print("Guess a magic number between 0 and 100")

# Prompt the user to guess the number
guess = eval(input("Enter your guess: "))

if guess == number:
    print("Yes, the number is " + str(number))
elif guess > number:
    print("Your guess is too high")
else:
    print("Your guess is too low")

Guess a magic number between 0 and 100
Enter your guess: 55
Your guess is too low
In [16]:
import random

# Generate a random number to be guessed
number = random.randint(1, 100)

print("Guess a magic number between 0 and 100")

guess = -1
while guess != number:
    # Prompt the user to guess the number
    guess = eval(input("Enter your guess: "))

    if guess == number:
        print("Yes, the number is", number)
    elif guess > number:
        print("Your guess is too high")
    else:
        print("Your guess is too low")

Guess a magic number between 0 and 100
Enter your guess: 50
Your guess is too low
Enter your guess: 75
Your guess is too high
Enter your guess: 62
Yes, the number is 62
In [17]:
data = eval(input("Enter an integer (the input exits " + 
    "if the input is 0): "))

# Keep reading data until the input is 0
sum = 0
while data != 0:
    sum += data

    data = eval(input("Enter an integer (the input exits " +
        "if the input is 0): "))

print("The sum is", sum)

Enter an integer (the input exits if the input is 0): 6
Enter an integer (the input exits if the input is 0): 6
Enter an integer (the input exits if the input is 0): 6
Enter an integer (the input exits if the input is 0): 7
Enter an integer (the input exits if the input is 0): 7
Enter an integer (the input exits if the input is 0): 7
Enter an integer (the input exits if the input is 0): 0
The sum is 39
In [ ]: